Testing cats before giving them heartworm pills involves a few blood tests that are administered at the veterinarian’s office. Seek veterinarian help before putting a cat on heartworm prevention withadvice from a practicing veterinarian in this free video on pet care. Expert: James Talbott Bio: Dr. James R. Talbott is a staff veterinarian at Belle Forest Animal Hospital and Kennel in Nashville, Tenn. Filmmaker: Dimitri LaBarge